{"title":"基于 PEG 的辅助溶剂水性电解质可实现高能量可充电镁离子水电池","authors":"Shuxin Zhang, Yukun Sun, Xiaoqin Zeng, Jun Yang, Jiulin Wang, Yanna NuLi","doi":"10.1016/j.nanoen.2024.110307","DOIUrl":null,"url":null,"abstract":"In contrast to organic electrolyte systems, rechargeable aqueous magnesium-ion batteries (RAMIBs) offer unparalleled advantages, particularly in environmental sustainability, safety, cost-effectiveness, and their potential for large-scale energy storage. However, the practical implementation of RAMIBs has been hindered by the limited electrochemical stability of aqueous electrolytes. Although polyethylene glycol (PEG)-based aqueous electrolytes provide a wide electrochemical window, the poor ionic conductivity has restricted their widespread adoption. In this study, we address this challenge by employing trimethyl phosphate (TMP) and PEG400 as the co-solvent of aqueous magnesium-ion electrolytes. This combination significantly enhances the ionic conductivity to 4.44 mS cm<sup>-1</sup> and increases the electrochemical stability window of the aqueous electrolyte by mitigating the activity of H<sub>2</sub>O. In addition, we underscore the role of TMP as a potent co-solvent in modulating the solvation structures of Mg<sup>2+</sup> ions and modifying the electrochemical behavior of the electrolytes. Leveraging this advancement, in conjunction with a V<sub>2</sub>O<sub>5</sub> cathode and a 3,4,9,10-perylenetetracarboxylic diimide (PTCDI) anode, the resulting RAMIBs demonstrate a remarkable discharge capacity of 227.6 mAh g<sup>-1</sup>, a large energy density of 157<!-- --> <!-- -->Wh<!-- --> <!-- -->kg<sup>-1</sup> and a high power density of 70<!-- --> <!-- -->W<!-- --> <!-- -->kg<sup>-1</sup>. Our findings represent a significant stride toward exploiting the full potential of RAMIBs for future energy storage applications.","PeriodicalId":394,"journal":{"name":"Nano Energy","volume":null,"pages":null},"PeriodicalIF":16.8000,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"PEG-based co-solvent aqueous electrolytes enabling high-energy rechargeable aqueous magnesium-ion batteries\",\"authors\":\"Shuxin Zhang, Yukun Sun, Xiaoqin Zeng, Jun Yang, Jiulin Wang, Yanna NuLi\",\"doi\":\"10.1016/j.nanoen.2024.110307\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In contrast to organic electrolyte systems, rechargeable aqueous magnesium-ion batteries (RAMIBs) offer unparalleled advantages, particularly in environmental sustainability, safety, cost-effectiveness, and their potential for large-scale energy storage. However, the practical implementation of RAMIBs has been hindered by the limited electrochemical stability of aqueous electrolytes. Although polyethylene glycol (PEG)-based aqueous electrolytes provide a wide electrochemical window, the poor ionic conductivity has restricted their widespread adoption. In this study, we address this challenge by employing trimethyl phosphate (TMP) and PEG400 as the co-solvent of aqueous magnesium-ion electrolytes. This combination significantly enhances the ionic conductivity to 4.44 mS cm<sup>-1</sup> and increases the electrochemical stability window of the aqueous electrolyte by mitigating the activity of H<sub>2</sub>O. In addition, we underscore the role of TMP as a potent co-solvent in modulating the solvation structures of Mg<sup>2+</sup> ions and modifying the electrochemical behavior of the electrolytes. Leveraging this advancement, in conjunction with a V<sub>2</sub>O<sub>5</sub> cathode and a 3,4,9,10-perylenetetracarboxylic diimide (PTCDI) anode, the resulting RAMIBs demonstrate a remarkable discharge capacity of 227.6 mAh g<sup>-1</sup>, a large energy density of 157<!-- --> <!-- -->Wh<!-- --> <!-- -->kg<sup>-1</sup> and a high power density of 70<!-- --> <!-- -->W<!-- --> <!-- -->kg<sup>-1</sup>. Our findings represent a significant stride toward exploiting the full potential of RAMIBs for future energy storage applications.\",\"PeriodicalId\":394,\"journal\":{\"name\":\"Nano Energy\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":16.8000,\"publicationDate\":\"2024-10-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Nano Energy\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1016/j.nanoen.2024.110307\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nano Energy","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.nanoen.2024.110307","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
In contrast to organic electrolyte systems, rechargeable aqueous magnesium-ion batteries (RAMIBs) offer unparalleled advantages, particularly in environmental sustainability, safety, cost-effectiveness, and their potential for large-scale energy storage. However, the practical implementation of RAMIBs has been hindered by the limited electrochemical stability of aqueous electrolytes. Although polyethylene glycol (PEG)-based aqueous electrolytes provide a wide electrochemical window, the poor ionic conductivity has restricted their widespread adoption. In this study, we address this challenge by employing trimethyl phosphate (TMP) and PEG400 as the co-solvent of aqueous magnesium-ion electrolytes. This combination significantly enhances the ionic conductivity to 4.44 mS cm-1 and increases the electrochemical stability window of the aqueous electrolyte by mitigating the activity of H2O. In addition, we underscore the role of TMP as a potent co-solvent in modulating the solvation structures of Mg2+ ions and modifying the electrochemical behavior of the electrolytes. Leveraging this advancement, in conjunction with a V2O5 cathode and a 3,4,9,10-perylenetetracarboxylic diimide (PTCDI) anode, the resulting RAMIBs demonstrate a remarkable discharge capacity of 227.6 mAh g-1, a large energy density of 157 Wh kg-1 and a high power density of 70 W kg-1. Our findings represent a significant stride toward exploiting the full potential of RAMIBs for future energy storage applications.
期刊介绍:
Nano Energy is a multidisciplinary, rapid-publication forum of original peer-reviewed contributions on the science and engineering of nanomaterials and nanodevices used in all forms of energy harvesting, conversion, storage, utilization and policy. Through its mixture of articles, reviews, communications, research news, and information on key developments, Nano Energy provides a comprehensive coverage of this exciting and dynamic field which joins nanoscience and nanotechnology with energy science. The journal is relevant to all those who are interested in nanomaterials solutions to the energy problem.
Nano Energy publishes original experimental and theoretical research on all aspects of energy-related research which utilizes nanomaterials and nanotechnology. Manuscripts of four types are considered: review articles which inform readers of the latest research and advances in energy science; rapid communications which feature exciting research breakthroughs in the field; full-length articles which report comprehensive research developments; and news and opinions which comment on topical issues or express views on the developments in related fields.